Question

Statement I: Spiral cuticular thickenings of trachea in cockroach are called taenidia.
Statement II: In cockroach, inspiration is a passive process.

• A. Both statements I and II are correct
• B. Both statements I and II are false
• C. Statement I is correct. But II is false
• D. Statement I is false. But II is correct

Hint:

Taenidia are the cuticular thickenings found in the trachea of insects, including cockroaches, providing structural support. In cockroaches, inspiration is passive, unlike in humans where the process is active.

Answer 1

The Correct Option is A

Step 1: Statement I is correct because in cockroaches, the tracheal tubes are reinforced by spiral cuticular thickenings, which are called taenidia.
Step 2: Statement II is also correct because in cockroaches, inspiration (inhalation of air) is a passive process that occurs due to the contraction and relaxation of body muscles, allowing air to flow in through spiracles.